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| author | Dave Marchevsky <davemarchevsky@fb.com> | 2021-09-17 21:29:05 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-09-18 00:02:05 +0300 |
| commit | 10aceb629e198429c849d5e995c3bb1ba7a9aaa3 (patch) | |
| tree | 1aa48fcb75302b3a2b2ec4f515f456bac55c4ea9 /arch/csky/mm/syscache.c | |
| parent | 84b4c52960bdccd86d6c3c42a730fd8d0ab75427 (diff) | |
| download | linux-10aceb629e198429c849d5e995c3bb1ba7a9aaa3.tar.xz | |
bpf: Add bpf_trace_vprintk helper
This helper is meant to be "bpf_trace_printk, but with proper vararg
support". Follow bpf_snprintf's example and take a u64 pseudo-vararg
array. Write to /sys/kernel/debug/tracing/trace_pipe using the same
mechanism as bpf_trace_printk. The functionality of this helper was
requested in the libbpf issue tracker [0].
[0] Closes: https://github.com/libbpf/libbpf/issues/315
Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210917182911.2426606-4-davemarchevsky@fb.com
Diffstat (limited to 'arch/csky/mm/syscache.c')
0 files changed, 0 insertions, 0 deletions